Boring-machine.



M. G. LAMB.

BORING MACHINE. M rLlcATlou FILED umso. ma.

2 SHEES-SHEET 2.

Snom/vio@ M. C .LAME

Patented Nov. 14, i916.,`

UNITED sTA'rEs ,PATENT OFFICE.

MUSE G. LAMB, OF SIKESTOYN, MISSOURI, ASSIGNOR T0 JOHN ADAMS, 0FSIKESTON,

MISSOURI. l

BORING-MACHINE.

Patented Nov. 14, 191e.

Application led December 30, 1915. Serial No. 69,427.

To all whom it may concern: Be it known that I, MosE characterespecially designed and adapted for use for boring cylinders or thelike, and it is an object of the invention to provide a 'machine of thisgeneral character having nove-l and improved means whereby it may beapplied into operative position with convenience and facility andmaintained in such position by the cylinder with which it is adapted tocoact.

Furthermore, it is an object ofthe invention to provide a machine ofthis general character having novel and improved means whereby thedirection of travel of the boring bar may be effectively andconveniently controlled. f

It is alsoy an object of the invention to provide a novel and improvedmachine of this general character whereby the guides for a Ycross headmay be bored simultaneously with the boring of a cylinder.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improved boringmachine whereby certain 1mportant advantages are attained and the deviceis rendered simpler, less expensive and otherwise more convenient andadvantageous for use, all as will be hereinafter more fullv set forth.

The novel features of the invention will be carefully'defined in theappended claims.

In order thatmy invention may be the better understood, I will nowproceed to de scribe the same with reference to the accompan-yingdrawings, wherein- Figure boring machine constructed 1n accordance withan embodiment of mv invention and in applied position; Fig.` 2 is a viewin elevation of the outer face of my improved boring machine; Fig. 3 isa transverse sectional view taken through a cylinder showmg a cutterhead constructed in accordance withv G. LAMB, a citi-v4 zen of the UmtedStates, residing at Sikes-` l is a sectional View illustrating aanembodiment of my invention coacting therewith; Fig. 4e is a transversesectional view taken through thereversing or feeding mechanism as hereinincluded; Fig. 5 is a longitudinal sectional view taken through thereversing or feeding mechanism, with the boring bar shown in fragmentand in elevation and an adjacent' portion of the frame in section; Fig;6 isa fragmentary view, partly in elevation and partly insec'-I tion,illustrating certain kdetails of construction as herein'embodied; Fig. 7is a fragmentary view in-section of a slightly modiied form of myinvention especially as relates to the centering of the'boring bar; Fig.

8 is a detail view partly' in elevation and partly in sectionillustrating a further means for centering the boring bar; and Fig. 9 isa sectional view taken substantially on the line 9-9 of Fig. 8.

As disclosed inl the accompanying drawings, C denotes a cylinder ofconventional type adapted for use in connection withv a rectilinearpiston and G denotes conventional guides for a cross head as generallyincluded in an type.

When it is desired to bore the cylinder C, the outer cylinder head andpiston are removed and 'the frame F of my improvedengine of areciprocating boring machine is secured directly to the open end of thecylinder.

The frame F, as herein embodied, comprises the .overlying plates 1 and 2main tained in'xed spaced relation by the clamping bolts 3 and theinterposed sleeves 4 embracing said bolts. The plates 1 and 2 areprovided with the alined openings 5 arranged at the axial center of thecylinder C when the frame is in applied position and disposed throughsaid openings 5 is the boring bar .B, said boring bar being of a lengthmaterially in excess of the length of the cylinder and directed throughthe stuifing box S of lthe cylinder C whereby it will be perceived thatthe boring bar B is effectively maintained inoperative position rotatein unison but permits an independent l l to a source of power.

A djustably mounted upon the boring bar B is the knife head 1G, hereindisclosed as being-,provided at its axial center with an opening 17through which the bori'nxr bar B is disposed and said opening 17 isdefined by an annular flange 18 ,through which the clamping bolts 19 aredisposed for engage- Y ment with the boring bar B whereby it will beperceived that the knife head 16 may be edectively clamped at apredetermined point longitudinally of the cutter bar B.

j At opposite sides of its axial center the knife head 16 lis providedwith the loops 20 through whichthe knives or cutters 21 are directed,said knives being maintained Jin predetermined adjustment through themedium of the clamping screws threaded through the loops 20 and`engaging the knives `or cutters, said lrnives being-so adjusted as toeffectively engage the inner wall of the cylinder 2 so as to properlybore the same. rlhe cutter head is provided at a point in alinernentwith each set of loops 2 with a lug through which is disposed the setscrew 24 engaging the inner end of a knife 0r cutter l21 sothat the samebe readily and effectively adjusted in an out ward direction.'

If desired, the boring bar B may be of such a length as to extend beyondthe. guides G for the cross head and in which event the bearing cap 25is detachably engaged with the guides G through'the medium of theclamping screws 26, said bearing cap 25 t serving 'as an' additionalsupport for the boring bar B, The portion of the'boring vbarhBinterposed betweenthe guides G has secured thereto the knife head 27 ofa conmv struction preferably similar toV the head 16 andsaid head 27 hascoacting therewith the The caps 29 and 33 are` provided with theequidistantly spaced radial slots 34 preferably four in numberand inwhich are arranged the extremities of the shafts 35 having mountedthereon intermediate their lengths the rollers 36 adapted to engage theperiphery of the boring bar B,

lt has been fully demonstrated in practice that upon imp'arting aXialrotation to the upper cap 33 in the requisite direction, the resultantinclinationof the rollers 36 will so contact withthe boring bar B as tocause the same to feed ortravel inwardly or'outwardly relative to thecylinder C.

As herein disclosed, l ailix to the upper cap 33 the operating lever orhandle 37 provided wit-h a spring latch 33 of conventional constructionadapted to coact with the spaced perforations producedfin the upperportion of the cylinder 30, whereby the rollers will be locked in theirvarious adjustments.

ln order to impose the requisite tension upon the shafts so as to causethe rollers 36 to effectively engage the boring bar B, l dispose throughthe cylinder 30 at points above and below the rollers 35 the set screws39 having their inner extremities provided with the springs 40 bearingagainst the shafts 35 whereby it will be perceived that equal pressureis imparted tothe rollers 36 irrespective of the angle of adjustment ofthe shafts 35. p j

I have found it of particular advantage Vand as especially illustratedin detail in Fig. 7, to provide an independent cone bearing 41 throughwhichthe boring bar B may be disposed and it is to be noted that saidbearing 41, owing to its formation ccacts with the stuling box 42 insucha vmanner as to bring the boring bar B to a true center at theadjacent end of the cylinder C. I also find it of advantage to provideat the end of the cylinder adjacent the frame F additional means wherebythe proper centering of the boring bar B may be assured. As illustratedin detail in Figs. 8 and 9, I employ a conventional centering deviceincluding the dogs 43 c'oacting with the cylinder C in a conventionalmanner and properly adjustable through the medium of the screws 44, saiddogs 43 and screws 44 being carried by the head 45 which -is preferablyin the form of Va. spider' comprising four arms 46.

From' the foregoing description, it is thought to be obvious that aboring machine constructed in "accordance with my invention is of anextremely simple .and comparatively inexpensive nature' and isparticularly well adapted for use by reason of the convenience andfacility with which it may be assembled, and it will also be obviousthat my' invention is susceptible of some change and modificationwithout material departure from the scope ofthe claims l and for-thisreason I do not Wish to be understood as limiting myself to the precisearrangement and rformation of the several parts herein shown in carryingout my invention in practice except as required by thev scope oi theappended claims.

l .I claim: A

l. A. boring machine 'for cylinders and the like comprising a frameadapted to be vsecured to the cylinder, a boring bar disposed throughthe frame `and mounted for axial rotation and for endwise movement,cutting means carried by the bar, means for rotatin the bar', rollersmounted for contact iv the bar, and means for inc-lining the axes oftheI rollers relative to the bar whereby the longitudinal movement ofthe bar may be controlled. y

2. A boring machine including a boring 'ba-r arranged for aXial rotationand endwise movement, a cylinder surrounding` the bor- 'Jing barand-concentric thereto, heads for the opposite ends of the cylinders,one of said heads being capable of4 rotative movement, each of saidheads 'being provided with slots, shafts mounted in said slots, rollerscarried by the shaftsengageab'le With ythe bar, and meansfor impartingmovement to the rotative head for inclining the axes ofthe rollersrelative to the bar whereby the longitudinal movement of the bar may becontrolled.

SQA boring machine including ar boring .bar arranged for axial rotationand endwise i Copies'of this patent may be obtained for five cents each,liyaddressing the Commissioner of "WashingtonJLCJ l movement, a cylindersurrounding the boring bar and concentric thereto, heads' for theopposite ends oi the cylinders, one of said heads being capable ofrotative movement, each of said heads being provided with slots, shaftsmounted in said slots, rollers carried by the shafts engageable with thebar, means for imparting movement to the heads being capable of rotativemovement,

each of said heads being provided with slots, shafts mounted in saidslots, rollers carried by the shafts engageable with the bar, means forimparting movement `to the' rotative head for inclining the axes of therollers relative to the bar'vvhereby the longitudinal -movement of thebar may be controlled, and

means'for imposing tension on the shafts to urge the same toward theboring bar.

in testimony whereof I hereunto affix my signature in the presence oftWo Witnesses.

MCSE G. LAMB,

v Witnesses: y

J. M. KELLER, W; H. VATKINS.

